Dynamic magnetic information storage or retrieval – Head – Core
Reexamination Certificate
2006-04-04
2006-04-04
Renner, Craig A. (Department: 2652)
Dynamic magnetic information storage or retrieval
Head
Core
C360S122000, C360S317000
Reexamination Certificate
active
07023658
ABSTRACT:
A trailing pole-tip for an electromagnetic transducer is formed as a layer oriented substantially perpendicular to other layers of the transducer, allowing the pole-tip to be made much thinner than conventional pole-tips. The novel pole-tip is formed on an edge or sidewall of a base layer instead of being formed on top of an existing layer. Potential errors in pole-tip thickness are much less than standard error tolerances for conventional pole-tip thickness. Having a greatly reduced pole-tip width significantly reduces the track width so that many more tracks can fit on a media surface, providing a large increase in areal density.
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Barr Ronald A.
Crue, Jr. Billy W.
Knapp Kenneth E.
Shi Zhupei
Harrison, Esq. Joshua G.
Renner Craig A.
Sawyer Law Group LLP
Western Digital (Fremont) Inc.
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